饲粮代谢能和粗蛋白水平对坝上长尾鸡产蛋性能的影响研究
Effects of dietary metabolic energy and crude protein levels on laying performance of Ba-shang long-tailed chickens
刘芳宇 1赵一帆 1王嘉睿 1李一凡 1李文硕 1赵国先 1郝艳霜1
作者信息
- 1. 河北农业大学动物科技学院,河北 保定 071001
- 折叠
摘要
试验旨在研究饲粮代谢能和粗蛋白水平对坝上长尾鸡产蛋性能的影响.试验采用3×3双因子设计,蛋白水平分别为15.5%、16.0%和16.5%,代谢能水平分别为11.87、11.47和11.07 MJ/kg.选取40周龄坝上长尾鸡216只,随机分为9组,每组4个重复,每个重复6只鸡.预试期1 w,正式试验期23 w.结果显示,坝上长尾鸡饲粮粗蛋白水平对生产性能无显著影响(P>0.05);11.07 MJ/kg的代谢能显著提高了产蛋率、平均日产蛋量和平均日采食量(P<0.05),降低料蛋比(P<0.05).15.5%的蛋白水平显著提高了能量表观消化率(P<0.05).研究表明,代谢能11.07 MJ/kg、粗蛋白15.5%组坝上长尾鸡的生产性能及养分表观代谢率最佳.
Abstract
This experiment was conducted to study the effects of dietary metabolic energy and crude protein levels on the laying performance of Ba-shang long-tailed chickens.A 3×3 two factorial design was employed,with protein levels of 15.5%,16.0%,and 16.5%and energy levels of 11.87,11.47,and 11.07 MJ/kg respectively.A total of 216 Ba-shang long-tailed chickens at the age of 40 weeks were randomly allocated into nine treatments,with four replicates per treatment and six chickens per replicate.The pre-test period was one week and formal test period was 23 weeks.The results showed that dietary crude protein level had no significant impact on production performance(P>0.05).A metabolizable energy of 11.07 MJ/kg significantly increased the laying rate,average daily egg production,and average daily feed intake(P<0.05),while reducing the feed-to-egg ratio(P<0.05).A protein level of 15.5%significantly improved the apparent digestibility of energy(P<0.05).The results show that the group of Ba-shang long-tail chickens with 11.07 MJ/kg metabolic energy and 15.5%crude protein had the best production performance and nutrient apparent metabolic rate.
关键词
坝上长尾鸡/代谢能/粗蛋白/生产性能/蛋品质Key words
Ba-shang long-tailed chickens/metabolic energy/crude protein/production performance/egg quality引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据